Open AccessNanostructured Cu–Cr–W pseudoalloys by combined use of high-energy ball milling and spark plasma sintering
Author(s) -
Н. Ф. Шкодич,
Kirill Kuskov,
И. Д. Ковалев,
Yu.B. Scheck
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/558/1/012047
Subject(s) - ball mill , spark plasma sintering , materials science , microstructure , sintering , electrical resistivity and conductivity , metallurgy , nanoscopic scale , composite material , nanotechnology , electrical engineering , engineering
Nanostructured pseudoalloys of immiscible Cu, Cr and W metals were prepared by combined use of high-energy ball milling (HEBM) and spark plasma sintering (SPS). Mechanical alloying in an Activator-2S planetary ball mill for 150 min provides a uniform distribution of refractory Cr and W particles in a moldable Cu matrix on a submicron and nanoscale level. Activated W–Cu–Cr powders were SPS-consolidated at 800−1000°C and 50 MPa for 10 min. The effect of preparation conditions on the microstructure, crystal structure, and properties (density, hardness, electric resistivity) of synthesized nanostructured W–Cu–Cr pseudoalloys was studied. The consolidated W–Cu–Cr composites showed a hardness of up to 9.5 GPa and an electric conductivity of 27–28% IACS, which makes them promising for use as an interrupter contact material.